# US 12,111,548 B2 · Light adjustment device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,111,548 B2 - Document ID: US12111548B2 - Status: Granted - Kind: B2 - Application number: 18/299,104 - Filed: 2023-04-12 - Published: 2023-08-03 - Granted: 2024-10-08 - Earliest claimed: 2021-03-31 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Koichi Nagao - Web page: https://patentgrep.com/patent/US12111548B2 ## CPC - G02F 1/13452: {Conductors connecting driver circuitry and terminals of panels} - G02F 1/136286: {Wiring, e.g. gate line, drain line} - G02F 1/1347: Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells - G02F 1/1365: in which the switching element is a two-electrode device {(G02F1/136277 takes precedence)} - G02F 1/13458: {Terminal pads} - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract According to an aspect, a light adjustment device includes: a panel unit in which a plurality of light adjustment panels are stacked in a first direction, the light adjustment panels each including a first substrate and a second substrate, the first substrate including at least two terminal groups each including a plurality of terminals that are capable of being coupled to one flexible printed circuit board, the second substrate overlapping with the first substrate; and a plurality of flexible printed circuit boards each of which is coupled to one of the terminal groups of a corresponding one of the light adjustment panels. A plurality of the terminal groups are arranged in a second direction intersecting the first direction when the panel unit is viewed in the first direction, and the flexible printed circuit boards do not overlap with one another when viewed in the first direction. ## Claims ### Claim 1 A light adjustment device comprising: a panel unit in which a plurality of light adjustment panels are stacked in a first direction, the light adjustment panels each including a first substrate and a second substrate, the first substrate including at least two terminal groups each including a plurality of terminals that are capable of being coupled to one flexible printed circuit board, the second substrate overlapping with the first substrate, and the light adjustment panels including a first light adjustment panel and a second light adjustment panel; and a plurality of flexible printed circuit boards including a first flexible printed circuit board and a second flexible printed circuit board, wherein a plurality of the terminal groups are arranged in a second direction intersecting the first direction when the panel unit is viewed in the first direction, wherein the first flexible printed circuit board is coupled to one of the terminal groups of the first substrate of the first light adjustment panel, wherein the second flexible printed circuit board is coupled to one of the terminal groups of the first substrate of the second light adjustment panel, wherein the flexible printed circuit boards do not overlap with one another when viewed in the first direction, wherein the first substrate has a rectangular shape including a first side and a second side intersecting the first side, and each of the terminal groups is provided at a corresponding one of the first side and the second side, wherein the panel unit includes a first unit including the first light adjustment panel and the second light adjustment panel adjacent to each other in the first direction, and a second unit stacked on or above the first unit and including a third light adjustment panel and a fourth light adjustment panel adjacent to each other in the first direction, wherein the first side of the first substrate of each of the first light adjustment panel and the second light adjustment panel extends along the second direction, and wherein the second side of the first substrate of each of the third light adjustment panel and the fourth light adjustment panel extends along the second direction. ### Claim 2 (depends on 1) The light adjustment device according to claim 1, wherein the terminals included in one of the at least two terminal groups provided to the first substrate are electrically coupled to the terminals included in another terminal group, respectively. ### Claim 3 (depends on 1) The light adjustment device according to claim 1, wherein each of the light adjustment panels includes a liquid crystal layer between the first substrate and the second substrate. ### Claim 4 A light adjustment device comprising: a panel unit in which a plurality of light adjustment panels are stacked in a first direction, the light adjustment panels each including a first substrate and a second substrate, the first substrate including at least two terminal groups each including a plurality of terminals that are capable of being coupled to one flexible printed circuit board, the second substrate overlapping with the first substrate, and the light adjustment panels including a first light adjustment panel and a second light adjustment panel; and a plurality of flexible printed circuit boards including a first flexible printed circuit board and a second flexible printed circuit board, wherein a plurality of the terminal groups are arranged in a second direction intersecting the first direction when the panel unit is viewed in the first direction, wherein the first flexible printed circuit board is coupled to one of the terminal groups of the first substrate of the first light adjustment panel, wherein the second flexible printed circuit board is coupled to one of the terminal groups of the first substrate of the second light adjustment panel, wherein the flexible printed circuit boards do not overlap with one another when viewed in the first direction, wherein the first substrate has a rectangular shape including a first side and a second side intersecting the first side, and each of the terminal groups is provided at a corresponding one of the first side and the second side, wherein the first light adjustment panel and the second light adjustment panel are adjacent to each other in the first direction, wherein the first side of the first substrate of the first light adjustment panel extends along the second direction, and the second side of the first substrate of the second light adjustment panel extends along the second direction, wherein each first substrate includes a first terminal group and a second terminal group, wherein the first terminal group is provided on the first side, and the second terminal group is provided on the second side, wherein the first terminal group includes a first terminal, a second terminal, a third terminal, and a fourth terminal, wherein the second terminal group includes a fifth terminal, a sixth terminal, a seventh terminal, and an eighth terminal, wherein the first terminal and the fifth terminal are electrically coupled to each other through a first wiring line, wherein the second terminal and the sixth terminal are electrically coupled to each other through a second wiring line, wherein the third terminal and the seventh terminal are electrically coupled to each other through a third wiring line, wherein the fourth terminal and the eighth terminal are electrically coupled to each other through a fourth wiring line, and wherein each of the second wiring line and the third wiring line is coupled to a liquid crystal drive electrode. ### Claim 5 (depends on 4) The light adjustment device according to claim 4, wherein the first wiring line and the fourth wiring line of each first substrate are electrically coupled, through a common electrode, to wiring lines of the second substrate stacked on or above the first substrate. ### Claim 6 (depends on 1) The light adjustment device according to claim 1, wherein each first substrate includes a first terminal group and a second terminal group, and wherein the first terminal group is provided on the first side, and the second terminal group is provided on the second side. ### Claim 7 (depends on 6) The light adjustment device according to claim 6, wherein the first terminal group includes a first terminal, a second terminal, a third terminal, and a fourth terminal, wherein the second terminal group includes a fifth terminal, a sixth terminal, a seventh terminal, and an eighth terminal, wherein the first terminal and the fifth terminal are electrically coupled to each other through a first wiring line, wherein the second terminal and the sixth terminal are electrically coupled to each other through a second wiring line, wherein the third terminal and the seventh terminal are electrically coupled to each other through a third wiring line, wherein the fourth terminal and the eighth terminal are electrically coupled to each other through a fourth wiring line, and wherein each of the second wiring line and the third wiring line is coupled to a liquid crystal drive electrode. ### Claim 8 (depends on 7) The light adjustment device according to claim 7, wherein the first wiring line and the fourth wiring line of each first substrate are electrically coupled, through a common electrode, to wiring lines of the second substrate stacked on or above the first substrate. ### Claim 9 (depends on 4) The light adjustment device according to claim 4, wherein the terminals included in one of the at least two terminal groups provided to the first substrate are electrically coupled to the terminals included in another terminal group, respectively. ### Claim 10 (depends on 4) The light adjustment device according to claim 4, wherein each of the light adjustment panels includes a liquid crystal layer between the first substrate and the second substrate.